import { v4 as uuidv4 } from 'uuid';
// 要生成一个随机的字符串，且每次执行不能发生变化，游客身份持久存储
export const getUUID = ()=>{
    // 先从本地存储看看是否存在uuid
    let uuid_token = localStorage.getItem("UUIDTOKEN")
    if(!uuid_token){
        uuid_token = uuidv4()
        localStorage.setItem("UUIDTOKEN",uuid_token)
    }else{
        localStorage.getItem("UUIDTOKEN",uuid_token)
    }
    return uuid_token
}